<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>





<script>
  //1.创建核心对象
  var xhttp = new XMLHttpRequest();

  //2.发送请求
  xhttp.open("GET", "http://localhost:8080/ajax-demo/ajaxServlet");
  xhttp.send();

  //3.获取响应
      xhttp.onreadystatechange = function() {
          if (this.readyState == 4 && this.status == 200) {
                  alert(this.responseText);
          }
      };


</script>
</body>
</html>